Zigzag harrow.



F. HANSON.

ZIGZAG HARROW.

APPLIGATION FILED MAB.27,1913.

1,091,1 31'.A Patented Mar. 24, 1914 [IN VEN T 0R W@ Freeman W750i? 'tiniTED sTATEs PATENT oEEIoE.

FREEMAN HANSON, OF'I-IOLLIS CENTER, MAINE.

ZIG-ZAG HARROW.

To all whom it may concern:

Be it known that l, FREEMAN HANsoN, a citizen of the United States, residing. at Hollis Center, in the county of York and State of Maine, have invented certain new and useful improvements in Zigzag Harrows; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to whichv it appertains to make and use the same, reference being had to the accompanying drawings', and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in rotaryA disk harrows and the object in view is to produce an apparatus of this nature comprising a series of disks having a zigzag shaft, the disks being so mounted thereon that the outer edges of the disks will be in straight parallel lines rather than mounted with the series of disks on either side of the center in lines which are at angles to each other as is commonly the practice.

The invention consists of various details of construct-ion and combinations and arrangements of parts which will be hereinafter fully described, shown in the accom panying drawings and then specifically defined in the appended claim.

I illustrate my invention in the accompanying drawings, in which Figure 1 is a top plan view of my zigzag harrow. Fig. 2 is an end elevation. Fig. 8 is a sectional view through one of the disks, and Fig. t is a detail sectional view through a collar which is iiXed to one of the shaft sections.

Reference now being had to the details ofA the drawings by letter, A designates a frame having a tongue B and a seat C. Said frame is provided with stub shafts B upon which the wheels A are mounted.

Sectional shafts, arranged in zigzag relation to one ano-ther, are provided, made up of sections the end ones being designated by letter D3, the outer ends of which have bearings in the opposite ends of the frame as shown. j y

A plate E has an aperture for the reception of the angular end of a shaft section K and a nut L is fitted to the threaded end of said section K. Said shaft section K has an integral laterally projecting arm E at one end thereof which is provided with an Specification of Letters Patent.

Application filed March 27, 1913.

Patented Mar. 24C, 1914.

Serial No. 757,237.

aperture for the reception of one arm of the central angular sect-ion N and to which arm Vofthe central section a nut L is fastened.

End shaft sections, designated by letter D3, are bent at an angle and have their outer ends journaled in bearings in the frame and t-he inner end of each passes through an aperture in the plate E and is held by means of a nut D, Sleeves F are journaled upon each of the shaft sections and each sleeve is provided with a shoulder D5, one of which is shown in section in Fig. 3 of t-he drawings, and against which shoulder a disk D2 is adapted to contact, said disk having a hollow shank portion D journaled upon the sleeve, and nuts H are fitted to the threaded portion of the sleeve and adapt-ed to bear. against the hollow shank portion D of the disks.

A crank arm, designated by letter O, integral with a collar O2, is fixed to one shaft section K and a spacing washer O3 is interposed upon the shaft section K intermediate the collar O2 and the adjacent plate E pivotally connected to a lever R mounted upon the pivot pin R and a pawl T is carried by said lever and is adapted to engage the teeth of the segment S, forming a convenient means whereby the shaft made up of a series of zigzag sect-ions may be raised or lowered as desired.

By the provision of a harrow made in accordance with my invention, it will be noted that the various disks mounted thereon will be disposed with their forward and rear edges in parallel lines and capable of being raised or lowered in the usual manner where harrow disks are arranged upon two shafts which are at angles to each other and which make it necessary that the various disks be in two different lines corresponding to the angles of the shafts upon which they are carried.

What I claim to be new is A disk harrow comprising a frame, a centrally disposed angular shaft section, plates secured to and at right angles with the arms of said central section, an integral shaft section projecting from each plate at right angles thereto, and parallel to the adjacent arm of said central section, end shaft sections each having its outer end j ournaled in said frame, other plates fastened one to each of said integral shaft sections and end sections, each of said end sections being bent at an angle and having a bearing in the frame, shouldered sleeves ournaled upon having pivotal link connections with seid said sections, disks having hollow shank porzum, as set forth.

tions journaled upon said sleeves, nuts itted In testimony whereof I hereunto u'Hix my upon the sleeves and bearing against the signature in presence of two witnesses.

5 ends of said hollow shank portions of the FREEMAN HANSON.

disks, a collar fixed to one of the sections Titnessesr and provided with an integral arm, and a XVM. M. BRADLEY. swinging lever mounted upon the frame and "u A. G. MGPHnRsoN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner or Patents.

' Washington, D. C. 

